/*  see copyright notice in squirrel.h */
#ifndef _SQLEXER_H_
#define _SQLEXER_H_

#ifdef SQUNICODE
typedef SQChar LexChar;
#else
typedef unsigned char LexChar;
#endif

struct SQLexer
{
	SQLexer();
	~SQLexer();
	void Init(SQSharedState *ss, SQLEXREADFUNC rg, SQUserPointer up,
			CompilerErrorFunc efunc, void *ed);
	void Error(const SQChar *err);
	SQInteger Lex();
	const SQChar *Tok2Str(SQInteger tok);

private:
	SQInteger GetIDType(const SQChar *s, SQInteger len);
	SQInteger ReadString(SQInteger ndelim, bool verbatim);
	SQInteger ReadNumber();
	void LexBlockComment();
	void LexLineComment();
	SQInteger ReadID();
	void Next();
#ifdef SQUNICODE
#if WCHAR_SIZE == 2
	SQInteger AddUTF16(SQUnsignedInteger ch);
#endif
#else
	SQInteger AddUTF8(SQUnsignedInteger ch);
#endif
	SQInteger ProcessStringHexEscape(SQChar *dest, SQInteger maxdigits);
	SQInteger _curtoken;
	SQTable *_keywords;
	SQBool _reached_eof;

public:
	SQInteger _prevtoken;
	SQInteger _currentline;
	SQInteger _lasttokenline;
	SQInteger _currentcolumn;
	const SQChar *_svalue;
	SQInteger _nvalue;
	SQFloat _fvalue;
	SQLEXREADFUNC _readf;
	SQUserPointer _up;
	LexChar _currdata;
	SQSharedState *_sharedstate;
	sqvector<SQChar> _longstr;
	CompilerErrorFunc _errfunc;
	void *_errtarget;
};

#endif
